Diazotization Combinations

DIAZOTIZATION COMBINATIONS, chemical reactions between diazonium salts (see Diazonium compounds) on one side and aromatic amines or phenols (naphthols) on the other. In diazotization combinations, the -N₂- group is preserved, forming a bond between both components of the reacting system. By means of diazotization reactions, a huge quantity of azo dyes is obtained in industry. Their diversity is explained by the fact that as the diazo component (diazonium salt) one can use not only diazotized aniline, but all its derivatives, as well as naphthylamines, benzidine and their derivatives, and combine them with various derivatives of phenols, naphthols, aniline, naphthylamine, diphenylamine, etc. Thus, diazotization combinations are one of the most important operations in the production of artificial dyes.